Non-prescribed use of methadone and buprenorphine prior to opioid substitution treatment : lifetime prevalence, motives, and drug sources among people with opioid dependence in five Swedish cities
Background: Opioid substitution treatment (OST) with methadone or buprenorphine is the most effective means of treating opioid dependence. If these substances are used by people who are not undergoing OST, they can however carry serious risks. This article examines the lifetime prevalence, motives, and drug sources for such use, as well as geographical differences in these variables. Methods: Stru
